The California gold rush began from 1848-1855. When gold was found in Sutter's Mill by Jmaes W.Marshall in Coloma, California . The news of the gold finding in California brought around 300,000 people from the rest of the United States to California. The gold seekers had a nickname called the forty-niners. The effects of Gold Rush was substantial. San Francisco grew from a small settlement of about 200 residents to to a boom town 36,000. Most of the gold Discover was in Northern California and very little gold discovery in Southern California. During the discovery of gold there was also racism between Americans, Indians, Chinese, and other immigrants. The gold rush was a key point for California's development.